bacteriorhodopsin

bacteriorhodopsin
A light-driven proton-pumping protein (248 residues, 26 kD), similar to rhodopsin, found in "purple patches" in the cytoplasmic membrane of the bacterium Halobacterium halobium. It is composed of 7 transmembrane helices, and contains the light-absorbing chromophore, retinal. Light absorption maxima: 568nm (light-adapted) ; 558nm (dark-adapted). Each photon results in the movement of 2 protons from cytoplasmic to extracellular sides of the membrane. The resulting proton gradient is used (amongst other things) to drive synthesis of ATP by chemiosmosis.

Dictionary of molecular biology. 2004.

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  • Bacteriorhodopsin — is a protein used by archaea, most notably halobacteria. It acts as a proton pump, i.e. it captures light energy and uses it to move protons across the membrane out of the cell. The resulting proton gradient is subsequently converted into… …   Wikipedia

  • Bacteriorhodopsin — Vorhandene Strukturdaten: s. UniProt …   Deutsch Wikipedia

  • bacteriorhodopsin —  Bacteriorhodopsin  Бактериородопсин   Мембранный белок, обнаруженный в морской архебактерии Halobacterium halobium. Присутствует в специализированных бляшках бактериальной цитоплазматической мембраны, называемой пурпурной мембраной, образуя там… …   Толковый англо-русский словарь по нанотехнологии. - М.

  • bacteriorhodopsin — [bak tir΄ē ō΄rō däp′sin] n. a purple protein containing retinal and found in the plasma membrane of certain bacteria (genus Halobacterium): it directly supplies electrochemical energy from sunlight …   English World dictionary

  • bacteriorhodopsin — noun Date: 1971 a purple pigmented protein that is found in the outer membrane of a bacterium (Halobacterium salinarium syn. H. halobium) and that converts light energy into chemical energy in the synthesis of ATP …   New Collegiate Dictionary

  • bacteriorhodopsin — /bak tear ee oh roh dop sin/, n. Biochem. a protein complex in the membrane of halobacteria that conducts a unique form of photosynthesis, employing the light sensitive pigment retinal rather than the chlorophyll used by all other known… …   Universalium

  • bacteriorhodopsin — noun Any of several related purple photosynthetic proteins, found in halobacteria, that act as proton pumps. See Also: proteorhodopsin …   Wiktionary

  • bacteriorhodopsin — bac·te·ri·o·rho·dop·sin bak .tir ē ō rō däp sən n a purple pigmented protein that is found in the outer membrane of a bacterium (Halobacterium salinarium syn. H. halobium) and that converts light energy into chemical energy in the synthesis of… …   Medical dictionary

  • bacteriorhodopsin — bac·te·rio·rhodopsin …   English syllables

  • bacteriorhodopsin — bac•te•ri•o•rho•dop•sin [[t]bækˌtɪər i oʊ roʊˈdɒp sɪn[/t]] n. biochem. a protein complex that contains retinal and is used by halobacteria for photosynthesis instead of chlorophyll • Etymology: 1975–80 …   From formal English to slang

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